diff --git a/README.md b/README.md
index 36e031b..86f481f 100644
--- a/README.md
+++ b/README.md
@@ -637,7 +637,7 @@ extensions = {'quickfix'}
 You can define your own extensions. If you think an extension might be useful for others then please submit a pr.
 
 ```lua
-local my_extension = {sections = {lualine_a = 'mode'}, filetypes = {'lua'}}
+local my_extension = {sections = {lualine_a = {'mode'}}, filetypes = {'lua'}}
 require'lualine'.setup {extensions = {my_extension}}
 ```
 
diff --git a/doc/lualine.txt b/doc/lualine.txt
index 5cb8436..04a08a7 100644
--- a/doc/lualine.txt
+++ b/doc/lualine.txt
@@ -666,7 +666,7 @@ Custom extensions                      You can define your own extensions. If
 
 
 >
-    local my_extension = {sections = {lualine_a = 'mode'}, filetypes = {'lua'}}
+    local my_extension = {sections = {lualine_a = {'mode'}}, filetypes = {'lua'}}
     require'lualine'.setup {extensions = {my_extension}}
 <